The 31-year-old first time mom is accused of grabbing her baby’s neck and feet, then shook him and threw him onto the bed

A 31-year-old mother pleaded not guilty to manslaughter in a Hong Kong court on Tuesday after she was accused of killing her two-month-old son on the outlying island of Cheung Chau in 2015.

The new mother, Leung Siu-fong, found her son Matthew Lee Man-hin suffering from convulsions, his face had turned pale and finally stopped breathing on the afternoon of August 25, 2015, the Court of First Instance heard on Tuesday.